Mean Squared Deviation

Need help answering the attached question.

It costs $50 to repair a component in a VCR. Compute the QLF for loses incurred as a result of a deviation from a target setting with a nominal tolerance of 10 + 0.25 mm required. The mean squared deviation is ½.

Use the data below to answer the determine variance and standard deviation. (note: carry your calculator out to 4 decimal places).
Year Actual Return Average Return Deviation for the MeanSquaredDeviation
1 .12 .103 .017

As the Quality Control Manager of a chemical company, you are asked to decide between several process methods that are supposed to uniformly mix 37.4 milligrams into a chemical solution. The resulting solutions from each process are sample tested for uniformity. The test samples yielded the following results of percentage powder